Georg friedrich deunerlohr



(-No Model.)

G. F. DEUNERLHR. ERASER.

Patented Sept. 23, 1890.

UNITED STATES PATENT OFFICE,

GEORG FRIEDRICH DEUNERLHR, OF MINDELI-IEIM, GERMANY.

E RAS R.

SPEGIFIGA'IION forming part of Letters Patent N0. 436,891, dated September 23, 189D.

Appliation filed J'nne 11, 1890. Serial N0. 355,025. (N0 model.)

T0 all whom 1125 may concern:

Be it known (hat I, GEORG FRIEDRICH DEUNERLHR, residing ab Mindelheim, Bavaria, German Empire, have invented a new and useful- Improvement in Erasers, of which the following is a speeification.

This invention relates t0 an eraser 0f improved eonstruction; anti it consists in the various features 0f improvement more fully pointed 0ut in t-l1e clairn.

In the accompanying drawings, Figure 1 is a side elevation of my improved emser; Fig. 2, a. cross-section 0n line A B,Fig. l.

The letter a represents ehe steel blade 0f the eraser, which is made of prismatic 01 triangular f0rn1 in cross-section, as shown. The three cutting-edges a of the blade curve inward toward the end 0f the bladeandform ehe p0int c. The blade a is provided with a handle b, as usual. The point and cuoting-edges 0f theblade are made 0f glass-hard stee1, so that the eraser retains its sharpness for a long time. In erasers (hat require frequent grinding soft spots are apt to be exposed that render the eraser use1ess. Moreover, in my eraser its shape excludes its illegitimate use for autting peneils or paper; bat ehe shape of my emser renders it highly convenient f01' its legitimate use. After an eraswre has been made by the cutting-edges a, the paper may be smoothed over by the flat faces of the blende between such cutting-edges.

What I clain1 is- An eraser composed 0f ahaudle and a prismatic stee1 blade having curved euttingedges that meet ab a point, substantially as specified.

In testimony whereof I have signed this specification in the presence of tw0 subscribing wit=nesses.

GEORG FRIEDRICH DEUNERLIIR.

Witnesses:

EMIL IIENZEL, EDW. W. MEALEY. 

